So i hav a crush on this boy but my boyfriend....?

Not technically, but you may be showing signs of emotional cheating. Crushes are okay, we're all human. But if you think about this other boy even when you're with your boyfriend, or you wonder a lot about what it would be like or if you would be happier with this other boy, you're probably starting to cross the line. Careful--some emotional cheating can hurt worse than physical cheating. Decide if you really do like this other boy and want to be with him, because it's just not fair to your boyfriend if you constantly think about and love someone else.